Distance sensors are widely used in applications that require distance measurement. It is also used in robotics application to detect and measure distance with wall or obstacles. So we are going to look on Analog Distance Sensor SN-GP2Y0A21. As it’s name sounds, it gives out analog readings with changes in distance.

Ever wonder how you can detect temperature in your projects? You can do so by using temperature sensor such as LM35 Precision Centrigrade Temperature Sensor. LM35 is a temperature whose voltage is linearly propotional to Celsius temperature. If you need other units such as Kelvin or Fahrenheit, you can apply some conversion from Celsius.